题目内容

常见的压电材料有发现、钛酸钡、锆钛酸铅等。

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压电式传感器等效成一个电压源和一个电容的联电路，也可以等效为一个电荷源与一个电容联的电路，以及相应的放大测量电路；

说明压电效应原理？

Businessethics are the moral standards ofconduct expected of or adopted by a business. They are ___1_ which guide business or which a business adopts as the acceptable standard of performancein respect of various stakeholders andinterested parties. These stakeholders include its customers, its _2_, its employees, its shareholders, government authorities, and any other party whichinteracts with the organization. If you plan to own or 3, it isadvisable to have knowledge of business ethics. It is basically thecode that business persons follow to ensure that they are doing 4 to achieve success. These codes were developed through years of studies and research. Business ethics is areflection of thenorm,5__ andfolkways of a certain country or place in respect of businesspractice.

成本还原分配率（还原系数）是用本月产成品所耗用上一步骤半成品费用除以( )。

A. 本月所产该半成品成本合计
B. 上月所产该种半成品成本合计
C. 本月所产该种半成品各成本项目
D. 上月所产该种半成品各成本项目